SMT201 AY2018-19T1 EX2 Ho Xin Yi

Land Sustability Study For National Communicable Disease Quarantine Centre

To identify whether Gombak Subzone is suitable for building a national Communicable Disease Quarantine Centre, it must meet the four decision factors:
1) Economic factor: The selected site should avoid steep slope. This is because construction at steep slope tends to involve a lot of cut-and-fill and will lend to relatively higher development cost.
2) Accessibility factor: The selected site should be close to existing local roads, namely: service roads and tracks. This is to ensure easy transportation of building materials during the construction stage.
3) Health risk factor: The selected site should be away from population i.e. housing areas and offices in order to avoid disease spreading to the nearby population.
4) Natural conservation factor: The selected site should be away from forested land, park and water.

Overview of Gombak: Roads, Buildings, Natural Features and Digital Elevation

ROADS

For the overview of roads in Gombak, I only kept two types of roads, which is service and track roads. I use purple to represent the service road and pink for the track roads. As you can see, Gombak is mostly covered with service roads, with 198 service roads and only 2 track roads. They are mainly situated at the north of Gombak. At the south of Gombak, there is a large area that is not covered by both service road or track road. Hence, it might not be the best place to build the quarantine centre as it is not easily accessible.

BUILDINGS

I use purple to represent the buildings. The location of the buildings in Gombak is similar to the location of the roads. The buildings is mostly situated at the north, east and west of Gombak. At the south of Gombak, there is a large area that is not covered by any buildings. It is suitable to build the quarantine centre there as it is away from the residential area.  

NATURAL FEATURES

There are three major natural features in Gombak: forest, park and water. Dark green was used to represent forest, light green was used to represent park and, blue was used to represent water. Similarly to both roads and buildings, at the south of Gombak, there is a large area without any natural features. It is suitable to build the quarantine centre there as it is away from natural features of Gombak.

DIGITAL ELEVATION

The higher the elevation of Gombak, the lighter the colour in the map gets. For Gombak, the highest elevation will be 145 metres above sea level while the lowest elevation will be 10 metres above sea level. The steeper land seems to be located at the south of Gombak.

Proximity Analysis of the four decision factors

Gombak: Proximity Analysis

PROXIMITY TO ROADS

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PROXIMITY TO BUILDINGS

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PROXIMITY TO NATURAL FEATURES

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SLOPE

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Criterion Score of the four decision factors

Gombak: Criterion Score

ACCESSIBILITY FACTOR

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HEALTH RISK FACTOR

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NATURAL CONSERVATION FACTOR

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ECONOMIC FACTOR

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Analytical Hierarchical Process

AHP report for decision factors: Accessibility, Health Risk, Natural Conservation, and Economic

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Land Suitability Analysis

Gombak Land Suitability

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Combined Criterion Score

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Percentage

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Suitable Land Areas for the building of National Communicable Disease Quarantine Centre